isl 6 chameleon: rapid charger series - Schulze Elektronik GmbH

isl 6 chameleon: rapid charger series 

operating instructions for software from V7.03, date of issue 17 DEC 2001 

schulze 

elektronik 

gmbh 

page 1 

Contents 

Chapter Subject Page 

1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 

2 How to obtain reliable, trouble-free operation . . . . . . . . . . . . . . . . . . . . . . 3 

3 Commonly used terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 

4 Useful information about batteries and maintenance (reflex-charging, memory-effect, characteristics) 4 

5 Fitting the CE tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 

6 Connecting the charger, selecting the program . . . . . . . . . . . . . . . . . . . . 6 

7 Overview Akku 1 and Akku 2 (battery 1 and 2) socket programs . . . . . . . . . . . 8 

8.1 Akku 1 socket: charging-balancing-measuring-discharging Ni-Cd batteries . . . . . . . . . 9-14 

8.1.1 I=xxx Charging with manual charge current selection . . . . . . . . . . . . . 9 

8.1.2 Auto-C Charging with fully automatic current selection . . . . . . . . . . . . . 10 

8.1.3 Auto-DC,3DC Pack balancing, fully automatic discharge/charge cycle . . . . . . . . . 11 

8.1.4 Auto-DC Pack measuring, fully automatic charge/discharge cycle . . . . . . . . . 12 

8.1.5 Auto-D Discharging, fully automatic current selection . . . . . . . . . . . . . . 13 

8.1.6 I-xxx Discharging, manual current selection . . . . . . . . . . . . . . . . . . 14 

8.2 Akku 1 socket: charging-discharging-measuring lead/acid batteries . . . . . . . . . . . . . . 15-16 

8.2.1 PB-D, PB-d Discharging lead/acid batteries . . . . . . . . . . . . . . . . . . . . . . 15 

8.2.2 PB C, PB c Charging lead/acid batteries . . . . . . . . . . . . . . . . . . . . . . . 16 

8.3 Akku 2 socket: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-21 

8.3.1 NiCd Charging nickel cadmium batteries . . . . . . . . . . . . . . . . . . . 17 

8.3.2 NiMH Charging nickel metal hydrid batteries . . . . . . . . . . . . . . . . . . 18 

8.3.3 Lead Charging lead/acid and sealed/lead batteries . . . . . . . . . . . . . . 19 

8.3.4 LiMn Charging lithium manganoxid batteries (Tadiran cells) . . . . . . . . . . 20 

8.3.5 LiIo Charging lithium ion batteries . . . . . . . . . . . . . . . . . . . . . . . 21 

9 Modifying charger characteristics (summary) . . . . . . . . . . . . . . . . . . . . . . 22-26 

9.1.1 Using the charger with an external car battery . . . . . . . . . . . . . . . . . . . . . . . . 23 

9.1.2 Using the charger with the 230 V mains supply . . . . . . . . . . . . . . . . . . . . . . . 23 

9.2 Setting the type of cell, cell count and charge current for the Akku 2 socket . . . . . . . . 24 

9.3.1 Setting the program type after a power on reset . . . . . . . . . . . . . . . . . . . . . . 25 

9.3.2 Setting the automatic charge termination process (e.g. for Ni-MH batteries) . . . . . . . 25 

9.3.3 Setting the switch output to drive a fan or to indicate battery full . . . . . . . . . . . . . . 26 

9.3.4 Setting the melody module to indicate battery full . . . . . . . . . . . . . . . . . . . . . . 26 

10 Legal matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 

11 Specification, technical features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 

12 RS232 interface pinout and data convention . . . . . . . . . . . . . . . . . . . . . . . 29 

13 Error messages and their causes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 

14 Trouble-shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 

15 Service questionnaire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 

schulze elektronik gmbh • prenzlauer weg 6 D-64331 weiterstadt tel: 06150/1306-5, fax: 1306-99 

internet: http://www.schulze-elektronik.com e-mail: mail@schulze-elektronik.com

page 2 

1 Warnings 

Injury hazard! Beware of sharp-edged parts 

(heat-sink, terminal clips) when handling the 

charger. 

The CE symbol does not entitle you to be careless 

when using or handling the charger, the 

power supply and the batteries. 

Before you connect the charger to a 12 V car 

battery ensure that the vehicle's engine is 

stopped. The charger may only be operated 

with the vehicle stationary and the engine 

stopped. 

The charger must be used with the original cables 

in unmodified form. The only permissible 

change is to use 4 mm gold-contact connectors. 

Never use wander plugs! 

Avoid short-circuiting the charge outputs to the 

car bodywork, as the isl 6 is not protected 

against this. In the interests of safety always 

place the charger on the ground. 

The charge leads and/or charge outputs must 

not be inter-connected or short-circuited in 

any way, as the result would be damage to 

the charger and/or the battery. To avoid 

shorts between the banana plugs on the 

charge lead please be sure to connect the 

charge cable to the charger first, and only 

then to the battery to be charged. Reverse 

the sequence when disconnecting. We recommend 

our safety charge lead which features 

no exposed banana plug contacts, as 

they are protected by a spring-loaded insulating 

sleeve. 

To meet the CE standards the length of the 

charge leads must not exceed 20 cm. 

There is always a danger of explosion when 

handling rapid-charge Ni-Cd batteries. To 

avoid problems never leave the charger unsupervised 

whilst rapid-charging is in 

progress. 

Before using the charger place the unit and the 

batteries to be charged on a non-flammable, 

heat-resistant and electrically non-conductive 

surface. 

Keep inflammable objects and volatile materials 

well away from the charging station. 


When you wish to charge batteries, remove 

them from the model or electrical device. 

When charging transmitter batteries it is essential 

to keep within the maximum charge current 

permitted for the transmitter circuit 

board by setting the charge current manually 

(0.5 - 2 A, see manufacturer's specification). 

If you set the charger's automatic charge termination 

to "sensitive+delayed", note that topping-up 

full cells makes them very hot. 

Never connect the isl 6 to a car battery which is 

simultaneously being charged by a car battery 


Protect the isl 6 from damp, water, shock and 

pressure. 

The unit must not be used if it exhibits any fault 

or is displaying an error message. 

Charging fewer than 4 cells at output 1: the 

special 16-bit A/D converter is outstanding 

accurate, but we cannot guarantee that the 

charger will work correctly in this situation. 

The charge termination may occur too early, 

too late, not at all, or even perfectly correctly, 

and the charge current will not approach 

the maximum rate. The reason for this is 

that the "kink" in the voltage curve of highcapacity 

cells is very slight. 

The following types of battery / pack / cell must 

not be connected to the charger: 

- packs consisting of different types of cell 

- mixtures of old and new cells, or cells of 

different make 

- non-rechargeable batteries (dry cells) 

- batteries which are not expressly stated by 

the manufacturer to be suitable for the high 

charge currents which this charger can supply. 

- individual faulty or damaged cells 

- batteries which are already fully charged or 

hot 

- batteries fitted with integral charge devices 

or charge termination circuits 

- batteries which are installed in a device, or 

are also connected electrically to other components. 

schulze elektronik gmbh prenzlauer weg 6 D-64331 weiterstadt tel: 06150/1306-5, fax: 1306-99 




2 How to obtain reliable, trouble-free 

operation 

It is essential to protect the charger from direct 

sunshine, dust, damp and rain. If the unit 

gets wet, dry it out thoroughly and have it 

checked and cleaned before re-use. 

The openings in the case must never be covered 

or sealed. 

The unit produces considerable heat in use. Allow 

excess heat to dissipate, and let the 

charger cool down after each rapid-charge 

process. 

Check the unit regularly for damage to the case 

and screen, and poor contact between cables 

and connectors. 

Keep the charge cables as short as possible. 

Cables longer than 20 cm cannot be used if 

you wish to conform to CE regulations. The 

internal battery wiring must also be as short 

as possible. Cable cross-section should be 

2.5mm2 (even for a receiver battery!). 

The charge cable should be fitted with highquality 

gold-contact connectors at both 

ends, and fittted with one of the ferrite tubes 

(CE tubes) supplied. The tubes are required 

to satisfy CE requirements (see Chapter 3). 

Twist charge leads together to minimise interference 

radiation. 

Take care not to break the ferrite core in the 

power supply cable, as it prevents the cable 

acting as an aerial and radiating converter 

and processor pulse frequency signals. 

The information and charging currents stated 

by the battery manufacturer must be observed 

at all times. Charge up only such 

batteries which are expressly stated to be 

suitable for high charge currents. 

Using the charger with a stabilised mains power 

supply unit (PSU) is possible in theory, but 

in fact cannot be generally recommended. 

The high charge power of the unit, inadequate 

output capacitance, residual voltage 

and other factors relating to the PSU may 

cause long-term and even terminal damage 

to the charger and/or the power supply. 

schulze 

elektronik 

gmbh 

page 3 

If you insist on using the unit in this way you will 

have to carry out your own tests and checks 

to ensure that your combination of charger - 

power supply works correctly. 

In general terms we have to say that none 

of the laboratory mains PSUs currently 

available is suitable for use with the isl 6 

without modification. 

Many transmitters are fitted with a protective diode 

which has to be by-passed if the battery 

is to be rapid-charged. Read your RC system 

instructions before you attempt to do this. 

Make it part of your standard procedure to 

check that the charge quantity indicated 

by the charger corresponds to the expected 

charge quantity when the unit has 

switched off after detecting the "battery 

full" condition. This is the only reliable 

means of recognising when the charger 

has terminated the charge prematurely. 

The most likely reason for premature 

charge termination is a deep-discharged 

pack and/or a pack with few cells (carry 

out test charges), or a particular type of 

cell. Caution: this can result in a crash if 

you fly a model with a part-charged battery. 

The sequence of letters "a", "b"... to indicate the 

probability of a full battery does not always 

prove that a pack is fully charged. Often the 

sequence of letters will appear at the start of 

the charge if the cells are deep-discharged. 

Individual cells to be charged must be soldered 

together, otherwise the fully automatic programs 

may not work properly. Do not use 

battery boxes with spring contacts. 

The isl 6 only sets the charge current calculated 

for a particular pack if that current does 

not cause any of the charger's parameters 

to be exceeded. 

Good results are obtained with Ni-MH batteries 

if you use manual charge current setting 

and set a current of no more than 1C. 

If a pack is completely flat (approx.

page 4 

3 Commonly used terms 

Final charge voltage: the voltage at which the battery's 

charge limit (capacity limit) is reached. The 

charge process switches from a high current to a 

low maintenance rate (trickle charge) at this point. 

From this point on further high current charging 

would cause overheating and eventual terminal 

damage to the pack. 

Final discharge voltage: the voltage at which the 

battery's discharge limit is reached. The chemical 

composition of the batteries determines the level of 

this voltage. Below this voltage the battery enters 

the deep discharge zone. Individual cells within the 

pack may become reverse-polarised in this condition, 

and this can cause permanent damage. 

Memory effect: A genuine memory effect has been 

recorded by Nasa, caused by repeated charge / 

discharge cycles. Nasa has found that full capacity 

can be regained by overcharging the cells. In modelling 

applications different effects are responsible 

for the reduction in cell capacity. The problem can 

be cured by balancing the cells (see below), and 

prevented by the measures described in Chapter 4.1.3. 

Balancing: a method of regaining full (nominal) capacity 

by alternately charging and discharging the 

pack, sometimes several times. This process is 

especially useful after a long period of non-usage 

(e.g. after purchase, or after several weeks without 

flying), and is also used to disperse the memory effect 

(see below). The effect of balancing is to break 

down the coarse crystaline structure (low capacity) 

inside the cell and convert it into a fine crystaline 

one (high capacity). 

Power-On (- reset): the status of the isl 6 after it 

has been connected to the car battery. 

Ready message: charger ready to run the program 

you have just selected (batteries not connected). 

C: Coulomb or capacity: Unit of measurement relating 

to the quantity of charged energy. In conjunction 

with charge current data this unit is used to determine 

the recommended / prescribed charge current 

of a battery of a given capacity. Example: if the 

charge current or discharge current of a 500 mAh 

battery is 50 mA, we refer to this as a charge or 

discharge at one tenth C (C/10 or 1/10 C). 

A, mA: unit of measurement relating to charge or 

dis-charge current. 1000 mA = 1 A (A=Ampere, 

mA=Milliampere) 

Ah, mAh: unit of measurement for the capacity of a 

battery (Amperes x time unit; h = hour). If a pack is 

charged for one hour at a current of 2 A, it has 

been fed 2 Ah of energy. It receives the same 

quantity of charge (2 Ah) if it is charged for 4 hours 

at 0.5 A, or 15 minutes (=1/4 h) at 8 A. 


4 Useful information about 

batteries and maintenance 

4.1.1 General information: 

Do not store or charge below 0°C, optimum is 10...30°C. 

A cold cell is not capable of accepting as much current as a 

warm one. For this reason you must expect differences in 

charge characteristics if you use fully automatic charge current 

calculation (in Winter the charging properties will be worse 

than in Summer). 

The lower the internal resistance of the battery, the higher the 

charger can increase the charge current for that battery. For a 

battery charger which sets the current automatically the 

resistance of the cable is added to the internal resistance. 

For this reason: use heavy cable (large cross-section), even 

for receiver batteries, and keep them short. Do not charge 

via a switch or switch harness! 

If you wish to measure battery capacity accurately a suitable discharge 

current is usually 1/10 C. 

4.1.2 Reflex charging: 

Charging processes which include a brief discharge pulse definitely 

have the effect that the battery is several degrees cooler 

at the end of the process. However, from the point of view of 

the competition operator this is an undesirable effect, as the 

cell chemistry can only supply high currents if its temperature 

is raised to a certain extent. 

All these effects, whether they actually occur or are simply 

hear-say, have no practical significance if batteries are 

correctly handled in the first place. When a battery is full, 

you can’t fill it any fuller! 

4.1.3 Memory effect of Ni-Cd and Ni-MH cells: 

If cells are repeatedly stored partially discharged, or are 

recharged from a half-discharged state, what is known as the 

memory effect sets in. The cells note that their full capacity is 

not required, and react by refusing to make it available. 

One aspect of this is that the crystalline chemical structure 

inside the cell changes; the cell‘s resistance rises and its 

voltage collapses under load, with the result that “full capacity” 

can no longer be exploited at normal discharge currents. 

Even if reflex charging were to eliminate the memory effect, there 

is no denying the necessity to store your cells in the discharged 

state; this applies to Ni-Cd cells and also, to some 

extent, to Ni-MH* cells. 

Otherwise, a characteristic feature of these cells is that they 

self-discharge - and the rate of discharge is different for each 

individual cell in a battery pack! 

If a fully charged pack is left for a considerable time, it will 

eventually consist of cells of widely varying states of charge. 

If at this point you ... 

a) ... give the pack a full charge: the cell with the most charge 

will be overcharged, heat up and be ruined, while the cell with 

the least charge will still not be full after the same period of 

charging. 

b) ... discharge the pack: the cell with the least charge will be 

completely flat first, then reverse polarity and often suffer an 

internal short-circuit. At the point when this happens, the cell 

with the most charge is still not yet completely discharged. 

This is a reliable method of wrecking your most valuable 

packs - and rest assured that reflex charging will make 

absolutely no difference. However, there is one method of 

avoiding the problem: discharge cells after use, and recharge 

them just before use! 

[*] about Ni-MH cells: see Section 4.3 





4.2 Nickel-Cadmium batteries (NiCd): 

Nominal voltage level: 1.2 V / cells. 

Selecting the fast charge current (manual setting): 

Charge current = 2 C (C = nominal battery capacity) 

Maximum continous discharge current: 

Currents of 10 C to 30 C are possible, depending on cell type. 

Maintenance of the Nickel-Cadmium batteries (Ni-Cd): 

If a battery is brand-new or used irregularly it is often only 

possible to balance it completely by carrying out several 

discharge - charge cycles (use auto-d program). 

The automatic current setting circuitry (patent applied for) provides 

optimum protection to your Ni-Cd batteries during charging. 

The reduced current towards the end of the charge ensures 

a completely full pack combined with only a slight temperature 

rise, as you will easily see in comparison with conventional 

constant current techniques. 

Do not use automatic charge current calculation when charging 

Ni-MH batteries! 

Amongst model car operators it is standard practice to erase any 

memory effect by completely discharging each cell individually 

via a resistor (approx. 68 Ohm). 

This deliberately ”unbalances” the pack, but it can cause the 

automatic charge termination circuitry to switch off the current 

prematurely during the charge process. 

For receiver batteries special types such as the Sanyo N-350- 

AAC (the C is the key!) are a good choice. 

Warning: The reduced charge current with 1-6 cells makes the 

voltage peak in the charge curve very slight, especially with 

batteries of high nominal capacity. In this situation the charger 

is sometimes unable to detect the ”full” condition due to the illdefined 

peak. 

4.3 Nickel-Metal-Hydride batteries (NiMH): 

Voltage level: 1.2 V / cell. 

Selecting the fast charge current (no automatic program!): 

Charge current typical 1 C (set a fixed current of, for example, 

1 A with 1100 mAh batteries, or 3 A with 3 Ah cells). Some 

modern high-current Ni-MH cells made by particular 

manufacturers can safely be charged at a higher rate of up to 

1.6 C (This applies to:Panasonic 3000: 3.5...4A, Powers 3000: 

3 A, Saft 3000: 3 A (not if battery is charged inside a 

transmitter!), Sanyo 3000: 4...5A). 


Currents of 5 C to 15 C are possible, depending on cell type. 

Typically for Sanyo Twicell and RC3000H cells: 

In our experience these cells can be treated in a similar way to 

Ni-Cd cells, i.e. they can safely be stored in the discharged 

state (use auto-d program). It is also possible to set the 

charger’s termination sensitivity to the same level as Ni-Cd 

cells (i.e. normal sensitivity); this eliminates the danger of 

premature charge termination. 

High maximum load capacity and voltage level. 

Typically for Panasonic P3000NIMH cells: 

These cells should never be stored completely discharged, i. e. 

use the auto -e program, not a bulb or resistors - even for 2 or 

3 days. For storage of more than 1 week: first discharge the 

pack , then charge about 10% of its capacity back into it. 

It is important that you take the trouble to give these cells a 

charge / discharge cycle around every four weeks, otherwise 

they become tired, and have to be pampered to restore them 

to full vigour. This involves going through the tiresome 

business of many repeated charge / discharge cycles. Of 

course, you should also give the cells one or more charge / 

discharge cycles before using them ”in anger”, as this 

refreshes the cell chemistry. 

High capacity and voltage level. 

schulze 

elektronik 

gmbh 

page 5 

Typical for Powers / GP GT3000R cells: 

Extremely high capacity, good voltage level. 

Other characteristics not yet determined in detail. 

4.3 Lead-acid batteries (Pb): 

Nominal voltage level: 2.0 V / cell. 

Selecting the fast charge current (pre-set for battery 2): 

Charge current = 1 C (C = nominal battery capacity) 


Typically 0,2 C, short time load up to 1 C. 

Maintenance: In contrast to Ni-Cd/Ni-MH batteries, lead-acid 

batteries must be fully recharged after use in order to maintain 

full capacity. 

The nominal capacity can be reduced very quickly by incorrect 

handling (overloading, repeated 100% discharges, and 

especially deep-discharges). Please observe the battery 

manufacturer’s recommendations. 

Typical: The characteristics of lead-acid batteries are quite different 

to those of the Ni-Cd sintered cell packs which are used 

as the power source in model aircraft, cars and hydro-boats. 

They can only tolerate relatively low currents relative to their 

capacity if their full capacity is to be exploited, and/or the 

voltage is not to collapse too far. 

Used as single-cell glowplug energiser batteries and power 

source in some scale boats. 

Very low self-discharge rate. 

Hint: When charging lead-acid batteries on Battery 1 output note 

that the isl 6 can only detect the correct number of cells and 

set the correct current if the battery is intact and slightly 

charged. 

4.5 Lithium-Manganese-Oxide batteries: (LiMnO): 



We recommend currents up to 0.35 C, depending on the cell type. 


We recommend currents up to 1.5 C. 

Maintenance: Always store these cells in the charged state. 

Typical: These cells are particularly recommended as receiver 

batteries (2 cells required), although correct charging and 

storage are very important. However, we do not recommend 

them as slow-fly flight packs (3 cells), since they have a limited 

ability to supply high currents, and their useful life varies 

greatly according to the discharge current and the extent to 

which they are discharged. 

Very good weight : energy ratio. 

Tip: Ideally all single cells in a pack should be charged 

separately; alternatively charge all cells in parallel. 

isl 6 uses a modified lead-acid charging program. 

The most common form of this cell type is the „Tadiran“ cell. 

4.6 Lithium-Ion batteries (LiIon): 



Charge current = 1 C or less (C = nominal battery capacity). 


Up to 4 C, depending on cell type. 

Maintenance: Always store these cells in the discharged state 

(use auto-d program), if stored fully charged, the result can be 

a permanent reduction in capacity. 

Typical: They are very popular as power supplies for sail 

winches (2 cells). 

Their limited ability to supply high currents means that they are 

only suitable as flight packs for slow-fly models (2-3 cells), but 

they are popular for that application. 

Very good weight : energy ratio. 

isl 6 uses a modified lead-acid charging program. 



page 6 

5 Fitting the CE tube 

Requirements: 

- The charge cable cross-section should be 2.5 

mm2 . 

- One wire should be coloured red (positive terminal 

+), the other black (negative -). 

- To meet CE requirements the charge lead 

should be no longer than 20 cm (minus the 

length of cable attached to the battery!). 

1. Solder a banana plug to each wire. To avoid 

short-circuits we recommend the use of safety 

banana plugs fitted with a sliding insulator. 

2. Wrap one of the cable ties (supplied) round 

the two wires about 4 cm from the banana 

plugs to hold the wires together. 

3. Slip the EMF tube onto the free end of the 

charge lead. 

4. Wrap a second cable tie round the two wires 

immediately adjacent to the tube (see illustration). 

Cable tie 

5. Twist the wires together and/or fit heat-shrink 

tubing to keep them tidy. 

6. Now solder the battery connector to the free 

ends of the charge lead. Don't forget to fit the 

pieces of heat-shrink sleeve required to insulate 

the soldered joints. 

A ready-made charge cable fitted with safety banana 

plugs and the CE tube is available from us 

under CE-kab-i6 (see illustration). 


6 Connecting the charger, 

selecting the program 

Please read Chapter 1, "Warnings" and 

Chapter 2 "How to obtain reliable and 

trouble-free operation", as they contain 

important information which you must 

know before you connect and use the 


6.1 Before you connect the charger 

Remove the isl 6 from its carton for charging to 

ensure adequate air circulation. 

Do not yet connect the unit to the battery or batteries 

to be charged. 

Ensure that the power supply (12V car battery, 

mains PSU) is stable and is not producing or 

suffering from problems. 

Ensure that the connections between the power 

supply and the terminal clamps of the isl 6 are 

making perfect contact. This is the reason why 

we cannot recommend wander plugs and car cigar 

lighter connectors. 

6.2 Switch on the power supply 

If you are connecting the unit to a car battery installed 

in a car: 

- Switch off the car engine. 

If you are using a suitable mains PSU: 

- Switch on the mains PSU first. 

6.3 Connect the isl 6 to the power supply 

Connect the terminal clamps to the power supply 

contacts quickly and confidently, taking care 

to maintain correct polarity. 

Once connected correctly the charger's screen 

shows the following "ready" message: 

(1) "(c) schulze gmbh" and 

(2) "isl 6-636+ V7.10" 

i. e. the manufacturers name is displayed in the 

first line, the second line shows the device type 

and version number of the software. 

On isl 6-330d, which includes a one line display 

only, the second line is displayed after a short 

wait time. 





If none of these messages appears: 

Immediately disconnect the terminal clamps, as 

damage may result from an undefined machine 

state. Wait 5 seconds, repeat Step 6.3. 

After that, display shows the selected cut off 

sensitivity for "battery 1" output (Akku 1): 

(1) "B1 cutoff mode " and 

(2) "normal " or 

(2) "sensitive " or 

(2) "sensitiv+delayed" 

Finally the charger's screen shows the "ready" 

message, which can be different depending on 

the chosen program. "13.8" is the car battery 

voltage in volts. 

(1) "B1 ready auto. c" and 

(2) "B2 4NiCd.3A 0mAh" (isl 6-330d) 

(2) "B2 4NiCd.3A 13.8" other isl-s. 

On isl 6-330d, which includes a one line display 

only, the cursor is located completely left and 

shows "ready" of battery 2. Pressing both buttons 

at the same time, the "second line" (2) of 

the display is showed. 

Instead of the car battery voltage (two line display) 

the charged capacity of battery 2 is displayed 

- which is 0 mAh after power on. 

6.4 Displaying the currently set program 

at the Akku 1 output 

Press the "+" or "-" button briefly (beep): 

The screen shows a status message for the currently 

set program (e.g. "fullautomatic C" 

for fully automatic charging). 

After about two seconds the "Ready" message 

appears as already described. 

The current program after connecting the power 

supply is the one which was either last active 

(before you disconnected) or the fully automatic 

charge program ("FAUTO"), depending on the 

machine configuration: Chapter 9. 

6.5 Selecting your chosen charge or 

dis-charge program for Akku 1 

Selecting a program usually requires that no 

battery is connected to Output 1. 

To avoid selecting unexpected programs 

change programs only with the battery discon- 

schulze 

elektronik 

gmbh 

page 7 

nected (exception: charging less than 4 cells)! 

Any program can be selected by pressing the + 

or - button repeatedly or holding it pressed in. 

The programs are grouped as described below 

in section 7. 

A changing of battery 2 output programs is only 

practicable while connecting isl 6 to the car battery 

(see sectionl 9.2). 

6.6 Connecting the battery after selecting 

the program 

After choosing the program (see program descriptions 

in Chapter 7 and 8) connect the battery 

with correct polarity. 

A short tone confirms the start of the program. 

The display shows alternating in 1 sec. interval: 

(charge-)time, battery voltage, carbatt.voltage 

"00:01 5.63V 13.8" (isl 6-330d) 

resp. 

(Lade-)Zeit, Akkuspannung, Autobatt.spannung 

"00:01 5.63V 13.8" other isl-s 

and 

(charge-)quantity, batt.voltage, (charge-)current. 

"01mAh 5.63V0.30A" 

Charging battery 2 only on the isl 6-330d, the 

charging data are not displayed as a cursor but 

in the same way as showing battery 1 data. For 

differentiation from battery 1 display 1...2 black 

rectangular fields are shown in the line. 

6.7 Displaying the charge/discharge quantities 

of e. g. combination programs 

Hold both buttons (+ and -) pressed for a short 

time and release it. 

dc programs shows all discharge quantities 

(capacity) in line one. In line two all charge 

quantities are displayed. 

cd programms shows it in reverse order (charge 

capacity in line 1). 

(1) "-99mAh68mAh,...," 

(2) "+.12Ah,...,,...," 

The example shows the 3dc program. A fully 

charged 110 mAh battery was connected and 

was one time fully discharged (-99mAh) and one 

time fully charged (0.12Ah=120mAh). Now it is 

in the third phase - with a currently discharged 

quantity of 68mAh. 



page 8 


7 Overview Akku/battery 1 and Akku/battery 2 socket programs 

7.1 Akku 1/ battery 1 socket programs 

Type of program Hint Usage 

Group 1 Lead/acid charging programs 

Pb C Lead/acid charging high current Fast charge-/Refresh charge 

Pb c Lead/acid charging low current for batteries with few capacity 

Group2 Lead/acid discharging programs 

Pb-d Lead/acid discharging max. 200mA precise capacity measurement 

Pb-D Lead/acid discharging high current for batteries with high capacity 

Group 3 Fixed current discharging programs 

d-50mA Ni-.. discharging precise cap. measurement .. .. for 500mAh Akkus (I=1/10C) 

... or normal discharge ... ... for 50mAh Akkus (I=1C) 

d-0,2A Ni-.. discharging fast discharge ... ... for 50mAh Akkus (I=4C) 

... Ni-.. discharging measuring the last bits... e.g. for receiver battery with 

d-1,0A Ni-.. discharging ...of energy (capacity) real currents 

Group 4 Combination programs, Ni-Cd only 

auto -d Ni-Cd/Li-Io discharging discharging thoroughly for storage 

auto cd Ni-Cd charge/discharging battery capacity test 

auto3dc Ni-Cd discharing/charging, 3 times formatting new batteries, maintenance and... 

auto-dc Ni-Cd discharing/charging ...deleting memory effect 

auto c Ni-Cd charging, standard-programm optimized charging, 2.5mm2 charging leads essential 

Group 5 Fixed current discharging programs 

I=D.1A Ni-.. charging I=0,4A pulsed =0,1A averaged duration charge program, 

no time limit no cut off long duration formatting 

I=.25A Ni-.. charging no time limit... ...but peak voltage cut off active 

I=0.3A Ni-.. charging current I = 2*C... ...for 110-150 mAh Ni-Cd batt. 

I=0.3A 

... 

Ni-.. charging current I = 1*C... ...for 300 mAh Ni-MH batteries 

I=3.0A Ni-.. charging I = 1 C ... 1,5 C... ...for Ni-MH battery with 3 Ah, 

I=3.0A Ni-.. charging I = 2 C ... 3 C... ...for Ni-Cd batteries with 1...1,5 Ah 

... common charging of elder batteries, when automatic current calculation does not... 

...calculate normal currents. batteries are used-up. 

I=5.5A Ni-Cd charging charge current setting for cells which stand highest currents 

I=6.0A isl 6-636+ only charge current setting for cells which stand highest currents 

7.2 Akku 2/ battery 2 socket programs 

1) Charging of 1 - 6* Nickel Cadmium batteries 1,2 - 7,2 V Currents: 100, 200, 332, 500** mA 

2) Charging of 1 - 6* Nickel Metallhydrid batteries 1,2 - 7,2 V Currents: 100, 200, 332, 500** mA 

3) Charging of 1 - 4* Lead/Acid or Lead/Gel batt. 2,0 - 8,0 V Currents: 100, 200, 332, 500** mA 

4) Charging of 1 - 3* Lithium Mangan Oxid batt. 3,0 - 9,0 V Currents: 100, 200, 332, 500** mA 

5) Charging of 1 - 3* Lithium Ion batteries 3,7-11,1 V Currents: 100, 200, 332, 500** mA 

[*] maximum cell count with a supply voltage of 13,8 V only, available on soft- & hardware from V 7.03 

[**] 500 mA not available on isl 6-330d 





8.1.1 Battery output 1, Ni-Cd / Ni-MH charge program(s) fixed c 

with manual charge current selection (I=x.xx) 

schulze 

elektronik 

gmbh 

page 9 

Purpose If you know the permissible charge currents for your batteries, you can use a matching 

charge program with a fixed defined current. The current can be used for balance-charging, 

standard and rapid charging (low, medium and high currents) with the charge periods calculated 

according to the state of charge of the battery. 

Manual current selection (no more than 1C) and "sensitive" automatic charge termination 

are the preferred method if you are using Ni-MH batteries, and also if you have to use thin 

charge cables and small numbers of cells. 

Cell type / No. Ni-Cd, Ni-MH, 1-30 cells (-330d ... -530d), 1-36 cells (-636+ and -636e). 

Description The selected program starts charging immediately using the current you have selected. 

This current is maintained until the charger detects "battery full". The charge rate is only reduced 

if the selected current threatens to overheat / overload the charger as voltage rises. 

Selectable currents: 0.1, 0.25, 0.3, 0.4, 0.5, 0.6, 0.8, 1.0, 1.2, 1.5, ... in 0.5A increments 

Maximum currents: -330d = 5.5 A, -430d = 5.0 A, -530d = 6.0 A, -636_= 6.5 A 

Special features - charging 1-3 Ni-Cd cells: to suppress low-voltage messages first select the D.1A program 

and then connect the battery. Now set your chosen program using the + and - buttons. 

See also the warnings relating to this in Chapters 1 and 2. 

- a charge lasting longer than 3 hours without any "full" detection halts the charge 

process without showing the charge period except in the following programs: 

- C.1A and 0.25A programs have no time limit 

- C.1A program (= 0.1A continuous charge): no automatic charge termination 

- C.1A program uses pulsed current (pulse - pause ratio 1 : 3) 

Settings - Call up the Power-On reset program you wish to use (see Chapter 9.3.1) 

for Power-On - Sensitivity of the automatic charge termination (see Chapter 9.3.2) 

Program 1. Disconnect any battery from Output 1. 

selection 2. Press the "+" or "-" button repeatedly or constantly to select the program you wish to use 

(I=x.xA, x.x = time statement). 

- Display while button is pressed: "Ch. current I=x.xA" 

3. Release the button. The charge program on the screen is now selected. 

If you change to a discharge program (without disconnecting the battery - if 1. is ignored), 

the screen will show the resultant charge quantity from the charge previously fed in and removed, 

first as a positive and then as a negative value. 

Connect battery 4. Now connect the battery to be charged to the Akku 1 output, maintaining correct polarity. 

The unit beeps to indicate the start of the charging process. 

Displays while charging 

Line1 - Current charge time, current charge voltage, current charge current 

alternating with: Current charge quantity, voltage, current/car battery voltage (on isl 6-330d) 

- Probability of full charge by series of letters "a" -> "b"... (buttons inactive) 

- "!": measuring for charge current and automatic charge termination (buttons inactive) 

- "*": charge current automatically reduced to guard against overheating 

- Various warnings and error messages in plain text, with error number 

- Pressing +&-buttons simultaneously: current programm; after release: charge capacity 

(see chapter 6.7) 

Displays after program end 

Line1 - Total charge time, final charge voltage, "full" e.g. "38:47 31.8V full" 

alternating with: - Total charged capacity, final charge voltage, "full" e.g. 

- "battery full" display by: brief buzz, LCD shows inverted "f" 

"2.6Ah 31.8V full" 

- Inverted "t": short pulses of current, widely spaced, to maintain charged state 


- Pressing +&-buttons simultaneously: current program; after release: charged capacity 



page 10 


8.1.2 Battery output 1, Ni-Cd charge program auto c 

with automatic charge current selection 

Purpose In most cases the "Auto C" fully automatic charge program is the right choice, as it provides optimum 

rapid-charging of batteries, charging fully but gently. Within the permissible capacity range of 

100 mAh to 4 Ah you do not need to have accurate knowledge about the type of Ni-Cd sintered cell 

you are using. The only pre-condit-ions are: adequate cross-section of the charge cable (2.5 mm2 ), 

high-quality connectors and a pack consisting of soldered cells. 

Cell type / No. Ni-Cd, 1-30 cells (-330d ... -530d), 1-36 cells (-636+ und -636e). 

Description The isl 6 automatically calculates the charge current most appropriate to the battery to be charged. 

It does this by measuring the battery continuously, and adjusting the charge current repeatedly to 

match the pack's ability to absorb charge and/or to the maximum capacity of the isl 6. Initially the 

charge rate is 300 mA for a brief period, then the current rises before falling again towards the end 

of the charge process. The program continues charging until it detects "battery full". It then switches 

to a maintenance (trickle) charge. 

- The calculated charge current is reduced if there is any danger of the charger overheating or being 

overloaded. 

- Maximum current: -330d = 5.5 A, -430d = 5.0 A, -530d = 6.0 A, -636_= 8.0 A 

Special features - charging 1-3 Ni-Cd cells: to suppress low-voltage messages first select the D.1A program and 

then connect the battery. Now set your chosen program using the + and - buttons. See also the 

warnings relating to this in Chapters 1 and 2. 

- A charge lasting longer than 3 hours without any "full" detection halts the charge process without 

showing the charge period. 


for Power-On - Sensitivity of the automatic charge termination (see Chapter 9.3.2) 


selection 2. Press the "+" or "-" button repeatedly or constantly to select program (auto c). 

- Display while the button is pressed: "fullautomatic. c". 

3. Release the button. The fully aiutomatic charge program on the screen is now selected. 

If you change to a discharge program (without disconnecting the battery - if 1. is ignored), the screen 

will show the resultant charge quantity from the charge previously fed in and removed, first as a positive 

and then as a negative value. 

Connect battery 4. Now connect the battery to be charged to the Akku 1 output, maintaining correct polarity. The unit 

beeps to indicate the start of the charging process. 


Line1 - Current charge time, current charge voltage, current charge current 

alternating with: Current charge quantity, voltage, current/car battery voltage (on isl 6-330d) 


- "!": measuring for charge current and automatic charge termination (buttons inactive) 







alternating with: - Total charged capacity, final charge voltage, "full" e.g. 


"2.6Ah 31.8V full" 



- Pressing +&-buttons simultaneously: current program; after release: charged capacity 





schulze 

elektronik 

gmbh 

page 11 

8.1.3 Battery output 1, Ni-Cd maintenance programs auto-dc and auto3dc 

(not isl 6-636e) with automatic discharge and charge current selection 

Purpose The two battery maintenance programs (1DC, 3DC) balance the state of your batteries in order to 

erase any existing memory effect. In particular, batteries which are only slightly discharged in use 

(e.g. transmitter and receiver packs) need to be dis-charged completely and recharged at regular intervals. 

Irregularly maintained and brand-new batteries often need this procedure to be carried out 

three times in a row. 

Cell type / No. Ni-Cd, 1-30 cells (-330d ... -530d), 1-36 cells (-636+). 

Description Using the auto-d program the battery is discharged down to the final discharge voltage and then recharged 

using the auto-c program (three times if you select the auto3dc program). The program 

charges until the charger detects "battery full", then switches to a maintenance (trickle) charge. 

- The initial value of the discharge current is calculated from the maximum discharge power dissipation 

and/or the charger's maximum permissible discharge current. 

- Once the final discharge voltage is reached, the discharge current is reduced in stages to a low value. 

- Continuous charge current adjustment to suit the battery's ability to absorb charge. 

- The calculated charge current is reduced if there is a danger of the unit overheat-ing or being overloaded. 

- Exception: if cells up to the number set for the Akku 2 charge section are connected, the charge 

current value for Akku 2 is set as the discharge current. 

- Max. charge current: -330d = 5.5 A, -430d = 5.0 A, -530d = 6.0 A, -636_= 8.0 A 

- Max. discharge current: 2,0 A, isl 6-330d = 1,0 A 

- Max. discharge power: 16 W, isl 6-330d = 10 W 

Special features - The isl 6 hardware is not designed for discharging 1-2 Ni-Cd cells. Reverse polarity guard diodes 

and the types of transistor used only allow the unit to discharge below 2 Volts at reduced currents; 

discharging below about 1 Volt is virtually impossible. 

- a charge period longer than 3 hours without any "full" detection halts the charge process without 

showing the charge period except in the following programs: 


for Power-On - Sensitivity of the automatic charge termination (see Chapter 9.3.2). 

Program 1. Disconnect any battery from Output 1 

selection 2. Press the "+" or "-" button repeatedly or constantly to select the program you wish to use (autodc 

oder auto3dc) 

- Display, button pressed: "fullautomatic-dc" or "fullautomatic3dc" 

3. Release the button. The combination program on the screen is now selected. 

If you change from the a discharge to a charge program (without disconnecting the battery - if 1. is 

ignored), the screen will show the resultant capacity from the previously discharge - at first as a negative 

and then as a positive value. 



Displays while discharging/charging 

Line1 - Current discharge/charge time, current discharge/charge voltage, current discharge/charge current 

alternating with: Current discharge or charge capacity, voltage, current/car battery voltage (on isl 6-330d) 

- Probability of full charge by series of letters "a" -> "b"... (buttons inactive) - during charge phase 

- "!": measuring for charge current and auto. charge termination (buttons inactive) - while charging 



- Pressing +&-buttons simultaneously: current programm; after release: discharge and charge capacity/capacities 




alternating with: Total charged quantity, final charge voltage, "full" e.g. "2.6Ah 15.9V full" 




- Pressing +&-buttons simultaneously: current programm; after release: discharged and charged 

capacity/capacities (refer to section 6.7) 



page 12 


8.1.4 Battery output 1, Ni-Cd capacity measuring program auto cd 

(not isl 6-636e) with automatic charge / discharge current selection 

Purpose This program allows you to examine individual battery packs for changes, and helps you draw conclusions 

about their further usefulness based on variations in meas-ured capacity data. 

Cell type / No. Ni-Cd, 1-30 cells (-330d ... -530d), 1-36 cells (-636+). 

Description The battery connected to the charger is charged up using the auto c program and then discharged 

using the auto -d program. 

- The isl 6 automatically and repeatedly calculates the charge current to match the battery. The calculated 

charge current is reduced if there is a danger of the unit overheating or being overloaded. 

The program charges until it detects "battery full". 

- The battery is then discharged down to the final discharge voltage. The initial value of the discharge 

current is calculated according ot the maximum power dissipat-ion and/or the unit's maximum 

permissible discharge current. 

- Exception: if cells up to the number set for the Akku 2 charge section are connected, the charge 

current value for Akku 2 is set as the discharge current. 

- Max. charge current: -330d = 5.5 A, -430d = 5.0 A, -530d = 6.0 A, -636_= 8.0 A 



Special features - The isl 6 is not designed for discharging 1-2 Ni-Cd cells. Reverse polarity guard diodes and the 

types of transistor used allow the charger to discharge below 2 Volts only at reduced currents; discharging 

below about 1 Volt is virtually impossible. 

- a charge period longer than about 3 hours without any "full" detection halts the charge 

progress without showing the charge period. 

Settings - Call up the Power-On reset program you wish to use (see Chapter 9.3.1). 

for Power-On - Sensitivity of the automatic charge termination (see Chapter 9.3.2). 


selection 2. Press the "+" or "-" button repeatedly or constantly to select the program you wish to use (auto 

cd). 

- Display, button pressed: "fullautomatic cd" 

3. Release the button. The combination program on the screen is now selected. 

If you change to a discharge program (without disconnecting the battery - if 1. is ignored), the screen 

will show the resultant charge quantity from the charge previously fed in and removed, first as a positive 

and then as a negative value. 



Displays while charging/discharging 

Line1 - Current discharge/charge time, current discharge/charge voltage, current discharge/charge current 

alternating with: Current discharge or charge capacity, voltage, current/car battery voltage (on isl 6-330d) 

- Probability of full charge by series of letters "a" -> "b"... (buttons inactive) - during charge phase 

- "!": measuring for charge current and auto. charge termination (buttons inactive) - while charging 



- Pressing +&-buttons simultaneously: current programm; after release: charged and discharged 

capacity (chapter 6.7) 


Line1 - Total discharge time, final discharge voltage, "empty" e.g. "65:09 8.51Vempty" 

alternating with: - Total discharge capacity, final discharge voltage, "empty" e.g. "1.9Ah 8.51Vempty" 

- "battery empty" display by: brief buzz, LCD shows inverted "e" 


- Pressing +&-buttons simultaneously: current programm; after release: charged and discharged 

capacity (chapter 6.7) 





8.1.5 Battery output 1, Ni-Cd / Ni-MH discharge program auto -d 

(not isl 6-636e) with automatic discharge current selection 

schulze 

elektronik 

gmbh 

page 13 

Purpose This discharge program discharges the pack as quickly and thoroughly as possible, and is 

therefore ideal for preparing cells for storage, and also for balancing and refreshing cells. 


Description The battery connected to the unit is discharged down to the final discharge voltage. 

- The initial value of the discharge current is calculated from the maximum discharge power 

dissipation and/or the charger's maximum permissible discharge current. 

- Exception: if cells up to the number set for the Akku 2 charge section are connected, the 

charge current value for Akku 2 is set as the discharge current. 

- When the final discharge voltage is reached, the discharge current is reduced in stages 

down to a low value, in order to remove from the pack the last usable residual energy before 

the program is switched off. 

- Final discharge voltage: approx. 0.85 V / cell 



Special features - The isl 6 hardware is not designed for discharging 1-2 Ni-Cd cells. Reverse polarity guard 

diodes and the types of transistor used allow the charger to discharge below 2 Volts only at 

reduced currents; discharging below about 1 Volt is virtually impossible. 


for Power-On 



(auto-d). 

- Display, buton pressed: "fullautomatic -d". 

3. Release the button. The discharge program on the screen is now selected. 

If you change to a charge program (without disconnecting the battery - if 1. is ignored), the 

screen will show the resultant capacity from the previously discharge - first as a negative 



The unit beeps to indicate the start of the discharging process. 

Displays while discharging 

Line1 - Current discharge time, current discharge voltage, current discharge current 

alternating with: Current discharge capacity, voltage, current/car battery voltage (on isl 6-330d) 

- "*" alternating with "-": discharge current automatically reduced to guard against overload. 


- Pressing +&-buttons simultaneously: current programm; after release: discharge 

quantity (see chapter 6.7) 



alternating with: Total discharge capacity, final discharge voltage, "empty" "1.9Ah 8.51Vempty" 



- Pressing +&-buttons simultaneously: current programm; after release: discharged 

capacity (see chapter 6.7) 



page 14 


8.1.6 Battery output 1, Ni-Cd / Ni-MH discharge program(s) fixed-d 

(not isl 6-636e) with manual discharge current selection (I-x.xxA) 

Purpose After partially discharging a battery in use it can be interesting to know what an afternoon's 

flying, a particular driving style or a new power system has cost or saved you in terms of energy. 

This discharge program supplies that information. 


Description The selected program starts discharging immediately with the selected constant current. 

The discharge current is maintained down to the final discharge voltage. 

- The discharge current is automatically reduced if the current you have set threatens to 

overheat the charger (max. power dissipation 16W). 

- Selectable currents: 25 mA, 50 mA, 0.1, 0.2, 0.3, 0.5, 0.8, 1.0, 1.2, 1.5, 2.0 A 

- Exception: if cells up to the number set for the Akku 2 charge section are connected, the 

charge current value for Akku 2 is set as the discharge current. 

- The unit is able to detect the number of cells connected with sufficient accuracy. 

- A useful discharge current for an accurate measurement of battery capacity is usually one 

tenth of nominal capacity (1/10 C) 

- Final discharge voltage: approx. 0.85 V / cell 

- Max. discharge current: 2.0 A 

- Max. discharge power: 16 W 

Special features - The isl 6 hardware is not designed for discharging 1-2 Ni-Cd cells. Reverse polarity guard 

diodes and the types of transistor used allow the charger to discharge below 2 Volts only at 

reduced currents; discharging below about 1 Volt is virtually impossible. 

Settings - Call up the Power-On reset program you wish to use (see Chapter 8.3.1). 

for Power-On 



(D-x.xA, x.x = No. of cells). 

- Display, button pressed: "disch.curr.-x.xA" 


If you change to a charge program (without disconnecting the battery - if 1. is ignored), the 

screen will show the resultant capacity from the previously discharge - first as a negative 



The unit beeps to indicate the start of the discharging process. 



alternating with: Current discharge capacity, voltage, current/car battery voltage (on isl 6-330d) 



- Pressing +&-buttons simultaneously: current programm; after release: discharge capacity 

(refer to section 6.7) 






- Pressing +&-buttons simultaneously: current programm; after release: discharge capacity 






7.2.1 Battery output 1, lead/acid discharge programs Pb-D, Pb-d 

(not isl 6-636e) with automatic/manual discharge current selection 

schulze 

elektronik 

gmbh 

page 15 

Purpose The Pb discharge programs are designed either for fast discharging (Pb-D) or for a reasonably 

accurate capacity measurement (Pb-d). 

Cell type / No. Lead-sulphuric acid and lead-gel, 2, 6, 12, 24 V (1, 3, 6, 12 cells) 

Description The battery connected is discharged down to the final discharge voltage. 

The "Pb-D" discharge program discharges at the highest possible current and then reduces 

in stages down to a relatively low current. 

The "Pb-d" program discharges at up to 200mA and is designed to allow reasonably accurate 

measurement of the battery's capacity. 

- The initial value of the "Pb-D" discharge current is calculated from the maximum discharge 

power dissipation and/or the unit's maximum permissible discharge current. 

- When the final discharge voltage is reached, the discharge current is reduced in stages 

down to a low value, in order to remove from the pack the last usable residual energy before 

the program is switched off. 

- Final discharge voltage approx. 1.73 V / cell 

- Max. discharge current 2.0 A, isl 6-330d = 1,0 A; less with 2V batteries (technical reasons) 

- Max. discharge power 16 W 


for Power-On 


selection If you do not do this it is impossible to change from a Ni-Cd to a Pb program. 

2. Press the "+" or "-" button repeatedly or constantly to select the program you wish to use 

(PB-D or PB-d). 

- Display, button pressed: "lead accu PB-D" or "lead accu PB-d" 


If you change to a charge program (without disconnecting the battery - if point 1 is ignored), 

the screen will show the resultant charge quantity from the energy previously removed and 

then charged-in, first as a negative and then as a positive value. 

Connect battery 4. Now connect the battery to be discharged to the Akku 1 output with correct polarity. 

- The unit beeps to indicate the start of the discharge process. 



alternating with: Current discharge quantity, voltage, current/car battery voltage (on isl 6-330d) 

- Discharge time "mm:ss" changes after 99 minutes dicharge time to "HHhmm" 

(mm = minutes, ss = seconds, HH = hours, : = minutes display, h = hour) 






Line1 - Total discharge time, final discharge voltage, "empty" e.g. "05h54 6.69Vempty" 








page 16 


7.2.2 Battery output 1, lead-acid charge programs Pb C, Pb c 

with automatic charge current selection 

Purpose The Pb charge programs charge lead-acid batteries virtually full within a few hours. 

Cell type / No. Lead-sulphuric acid, lead-gel, 2, 6, 12, 24 V (1, 3, 6, 12 cells) 

Description The Pb charge programs start charging at zero current when the battery is connected, then gradually 

increase the charge rate (at around one minute per Amp-hour capacity). When the battery's maximum 

voltage is reached the current is gradually reduced again. 

- The "Pb c" program charges at low currents (better filling, good for low-capacity batteries); while the 

"Pb C" charges at higher currents for high-capacity batteries. 

- When the battery first reaches the voltage limit for cyclic charging (approx. 2.45V/cell) the screen 

shows a letter "a". The battery is then about 75% fully charged, and further charging takes place 

much more slowly. Further rises in capacity are indicated in 5% increments with the letters "b", "c" ...; 

note that the period required to reach the "battery full" indication may take about as long as the appearance 

of "a" after initial connection. Note: these are not specific figures; they are just intended to 

give you a rough idea of how the lead-acid charge process is progressing. 

- The maintenance charge voltage and current are reduced to the permissible continuous limit values 

once "battery full" has been detected, but to ensure the battery is completely full and kept that way 

they are not switched off. The charged-in Amp-hours are added together and stated together with the 

current charge voltage. 

- Don't be surprised if the isl 6 shows "battery full" at around 70% of nominal capacity, especially with 

low-capacity batteries (up to about 3Ah). 

Settings - Call up the Power-On reset program you wish to use (Chapter 9.3.1) 

for Power-On 


selection If you do not do this it is not possible to switch from a Ni-Cd to a Pb program. 

2. Press the "+" or "-" button repeatedly or constantly to select the program you wish to use (Pb C or 

Pb c). 

- Display, button pressed: "lead accu Pb C" or "lead accu Pb c" 

3. Release the button. The charge program on the screen is now selected. 

If you change to a discharge program (without disconnecting the battery - if point 1 is ignored), the 

screen will show the resultant charge quantity from the energy previously charged-in and then removed, 

first as positive and then as negative value. 

Connect battery 4. Now connect the battery to be charged to the Akku 1 output with correct polarity. 

- The unit beeps to indicate the start of the charging process. 


Line1 - Current charge time, current charge voltage, current charge current "19:16 6.13V 3.2A" 

alternating with: Current charge quantity, voltage, current charge current or e.g. ".11Ah 6.13V 3.2A" 

Current charge quantity, voltage, car battery voltage (isl 6-330d) ".11Ah 6.13V 13.8" 

- "+": automatic charge current adjustment in progress; current slowly rising 



- Charge period "mm:ss" changes after 99 minutes charge period to "HHhmm" 

(mm = minutes, ss = seconds, HH = hours, : = minutes display, h = hour display) 


- Pressing +&-buttons simultaneously: current programm; after release: charge capacity (refer to 

section 6.7) 


Line1 - Charge time, current battery voltage, "full" e.g. "18h12 6.90V full" 

alternating with: Charged capacity, current battery voltage, "full" e.g. 


"4.6Ah 6.90V full" 


- Pressing +&-buttons simultaneously: current programm; after release: charge capacity (refer to 

section 6.7) 





schulze 

elektronik 

gmbh 

page 17 

8.3.1 Battery output 2, charge program for 1 to 6*- cell Ni-Cd batteries 

Purpose e.g. for charging receiver batteries down to 50 mAh or e.g. 6 cell transmitter batteries of 

high capacity. 

Cell type Set the cell type to NiCd batteries as explained in Section 9.2. 

Cell count Set the number of cells as explained in Section 9.2. 

Charge current Set the charge current as explained in Section 9.2 (Current value: see Section 4.2). 

Description The charge program starts charging with the pre-selected current and the set number of 

cells. At fixed intervals and after reaching the prescribed charge voltage limit the isl 6 

switches to a pulsed charge process. The better the battery maintains its voltage in the 

pauses, the longer the pauses become and the shorter the charge pulses become. 

- The current and the number of cells are determined by a special initialisation process 

which runs when the charger is first connected to the car battery (Section 9.2) 

Please note If the voltage at the battery output is excessive, the charger may fail to detect the presence 

of a battery. 

Settings - cell type to be connected (see Section 9.2) 

at Power-On - number of cells to be connected (see Section 9.2) 

- charge current (see Section 9.2 and 4.2) 

Connect battery Connect the battery to be charged to the battery 2 output, taking care to maintain correct polarity. 

- The charger beeps once to indicate the start of the charge process. 

Displays if output 2 is "ready" 

Line 2 - setting of battery output 2, car battery voltage, e.g. 

- press both buttons simultaneously to display charged-in 

"b2 4NiCd.1A 13.6" 

dto. isl 6-330d 

capacity (charge quantity) during the last charge process e.g. "49mAh4NiCd.1A b2" 

If the cursor (under the battery 1 data) is at ”ready” (i.e. at the far left of the screen) 

and if you press both buttons simultaneously, the screen shows: 

- last capacity and setting of battery output 2, e.g. "49mAh4NiCd.1A b2" 

Displays while output 2 is charging 

Line 2 - current charge time, current charge voltage, car battery voltage "07:23 5.63V 13.6" 

alternating on line 2, with alternating with 

- current charge quantity, current voltage, current current e.g. "12mAh 5.63V0.10A" 

When both buttons are pressed simultaneously: 

- current charge quantity and setting of battery output 2 e.g. "12mAh4NiCd.1A b2". 

dto. isl 6-330d - if battery 1 is not in use, the screen display is as above 

- if battery 1 is in use, the cursor under the battery 1 data indicates the approximate state of 

charge. 

If you press both buttons simultaneously, the screen shows 

- current capacity, cell count, cell type, charge current, "b2" e.g. "12mAh4NiCd.1A b2" 

Displays after output 2 program end 

Line 2 - time of "full" termination, cut off voltage,, car battery voltage "29:12 5.79V 13.6" 


- charged capacity, cut off voltage, "full" e.g. 

- "full" indication: brief buzz and inverted "f" on LCD screen 

"53mAh 5.79V full" 

dto. isl 6-330d - if battery 1 is not in use, the screen display is as shown above 

- if battery 1 is in use, the cursor under the battery 1 data indicates ”full”, i.e. the cursor is at 

the far right of the screen. 


- charged capacity and setting of battery output 2 e.g. "53mAh4NiCd.1A b2" 

[*] Maximum cell count only at supply voltage of 13,8 V; available from software & hardware V 7.03 



page 18 


8.3.2 Battery output 2, charge program for 1 to 6*- cell Ni-MH batteries 

Purpose For charging receiver batteries down to 100 mAh and 6 cell transmitter batteries. 

Cell type Set the cell type to NiMH batteries as explained in Section 9.2. 



Description The charge program starts charging with the pre-selected current and the set number of 

cells. At fixed intervals and after reaching the prescribed charge voltage limit the isl 6 

switches to a pulsed charge process. The better the battery maintains its voltage in the 

pauses, the longer the pauses become and the shorter the charge pulses become. 




of a battery. 



- maximum charge current (see Section 9.2 and 4.3) 




Line 2 - setting of battery output 2, car battery voltage, e.g. 

- press both buttons simultaneously to display charged-in 

"b2 4NiMH.3A 13.6" 


capacity (charge quantity) during the last charge process e.g. ".73Ah4NiMH.3A b2" 

If the cursor (under the battery 1 data) is at ”ready” (i.e. at the far left of the screen) 


- last capacity and setting of battery output 2 e.g. ".73Ah4NiMH.3A b2" 




- current charge quantity, current voltage, current current e.g. "89mAh 5.63V0.33A" 


- current charge quantity and setting of battery output 2 e.g. "89mAh4NiMH.3A b2". 



charge. 


- current capacity, cell count, cell type, charge current, "b2" e.g. "89mAh4NiMH.3A b2" 


Line 2 - time of "full" termination, cut off voltage, car battery voltage "27:12 5.72V 13.6" 


- charged capacity, cut off voltage, "full" e.g. 


".74Ah 5.72V full" 

dto. isl 6-330d - if battery 1 is not in use, the screen display is as shown above 




- charged capacity and setting of battery output 2 e.g. ".74Ah4NiMH.3A b2" 






schulze 

elektronik 

gmbh 

page 19 

8.3.3 Battery output 2, charge program for 1 to 4*- cell Lead-Acid batteries 

Purpose Typically to charge single-cell glowplug energiser batteries and 2-cell lead-gel and lead-acid batteries, 

which cannot be charged at the battery 1 output. 

Cell type Set the cell type to Lead batteries as explained in Section 9.2. 



Description The charge program initially charges at a very low current, and slowly increases the rate until 

the pre-selected value is reached - unless the maximum voltage typical of these cells is 

reached before this. Towards the end of the process the charge current is again reduced 

significantly, and under certain circumstances it may even fall to zero. 




of a battery. 







Line 2 - setting of battery output 2, car battery voltage, e.g. "b2 1Lead.5A 13.8" 

- press both buttons simultaneously to display charged-in capacity (charge quantity) 

during the last charge process (zero after "power-on") e.g. "00mAh1Lead.5A b2" 

dto. isl 6-330d If the cursor (under the battery 1 data) is at ”ready” (i.e. at the far left of the screen) 

and if you press both buttons simultaneously, the screen shows (332 mA max. with i6-330d): 

- last capacity and setting of battery output 2, e.g. "00mAh1Lead.3A b2" 




- current charge quantity, current voltage, current current e.g. ".11Ah 2.13V0.50A" 


- current charge quantity and setting of battery output 2 e.g. ".11Ah1Lead.5A b2". 


- if battery 1 is in use, the cursor under the battery 1 data indicates the approximate state of charge. 

If you press both buttons simultaneously, the screen shows (332 mA max. with i6-330d!): 

- current capacity, cell count, cell type, charge current, "b2" e.g. ".11Ah1Lead.3A b2" 


Line 2 - time of "full" termination, current voltage, car battery voltage "18h12 2.27V 13.8" 

(18 hours, 12 minutes) alternating on line 2, with alternating with 


- current charged capacity, current battery voltage, "full" e.g. "4.5Ah 2.27V full" 


- if battery 1 is not in use, the screen display is as shown above 




- current capacity and setting of battery output 2 e.g. "4.5Ah1Lead.3A b2" 




page 20 


8.3.4 Battery output 2, charge program for 1 to 3*- cell Lithium-Manganese-Oxide 

batteries (Tadiran) 

Purpose Typically to charge 2-cell lightweight high-capacity receiver batteries 

Cell type Set the cell type to LiMn batteries as explained in Section 9.2. 










of a battery. 







Line 2 - setting of battery output 2, car battery voltage, e.g. "b2 2LiMn.2A 13.7" 


during the last charge process (zero after "power-on") e.g. "00mAh2LiMn.2A b2" 



- last capacity and setting of battery output 2, e.g. "00mAh2LiMn.2A b2" 


Line 2 - current charge time, current charge voltage, car battery voltage "19.13 5.43V 13.7" 




- current charge quantity and setting of battery output 2 e.g. ".11Ah2LiMn.2A b2". 



charge. 

If you press both buttons simultaneously, the screen shows: 

- current capacity, cell count, cell type, charge current, "b2" e.g. ".11Ah2LiMn.2A b2" 





- current charged capacity, current battery voltage, "full" e.g. ".61Ah 6.70V full" 





If you press both buttons simultaneously, the screen shows: 

- current capacity and setting of battery output 2 e.g. ".61Ah2LiMn.2A b2" 






schulze 

elektronik 

gmbh 

page 21 

8.3.4 Battery output 2, charge program for 1 to 3*- cell Lithium-Ion batteries 

Purpose Typically to charge 2 or 3-cell lightweight high-capacity power batteries for slowflyer. 

Cell type Set the cell type to LiIo batteries as explained in Section 9.2. 










of a battery. 







Line 2 - setting of battery output 2, car battery voltage, e.g. "b2 3LiIo.5A 13.8" 


during the last charge process (zero after "power-on") e.g. "00mAh3LiIo.5A b2" 


and if you press both buttons simultaneously, the screen shows (332 mA max. with i6-330d): 

- last capacity and setting of battery output 2, e.g. "00mAh3LiIo.3A b2" 






- current charge quantity and setting of battery output 2 e.g. ".11Ah3LiIo.5A b2". 



charge. 


- current capacity, cell count, cell type, charge current, "b2" e.g. ".11Ah3LiIo.3A b2" 





- current charged capacity, current battery voltage, "full" e.g. "1.3Ah 12.4V full" 






- current capacity and setting of battery output 2 e.g. "1.3Ah3LiIo.3A b2" 




page 22 

9 Modifying charger characteristics 

9.1 Tabular summary 

Message 1: 

(c) schulze gmbh 

isl6-xxxx V7.xx 

Message 2: 

Car battery=10V 

(power is reduced) 

Key: 

Release "-" button 

isl 6-330d 


Press and hold button(s) 

& 

Connect isl 6 to car battery 

Message: 



Select menu 1: 

b1-cur.aft.reset 

last - + FAUTO 


b1 cutoff mode 

xxxxx - + next 


Switching output 

xxxxx - + next 

Select menu 4 (option): 

Melody select #xx 

ok = - + =next 

Message: 

b1 cutoff mode 

e.g. "normal" 

Message: 

Ready display 

Message for "ready" state or settings 

Action to display or select a charger characteristic 

Display of selectable charger characteristics 

Message: 




???? TypeSel A2 

???? - + next 


? CellCount A2 

? - + next 


cur-???-rent A2 

???mA=- + next 


internet: http://www.schulze-elektronik.com e-mail: mail@schulze-elektronik.com 

- 

- 

-



9.1.1 Use with an external 12V car battery 

An external 12V battery can safely be discharged 

to a lower level with the isl 6 than a car 

battery which is required to start a car engine. 

The option of deeper discharge can be selected 

when you connect the isl 6 to the battery. At the 

same time you can limit the maximum charge 

power (see 9.1.2.2 "Use with a 22/25A mains 

PSU"). 

If you wish to do this, hold the "-" button on the 

isl 6 pressed in while you connect it, until the 

charger's screen shows the message 

"car battery =10V" in the first line. 

The low-voltage warning message range (# 5) 

then lies approximately between 9.75 und 

10.5V, and below 9.75V the unit switches itself 

off (error # 72). 

The charger does not store the "-" button 

press during initial connection, so 

the setting has to be repeated at the 

start of every session with the charger. 

The best way to exploit the full charge power of 

the unit is to delay making the change until the 

first message 

"car battery=MIN" or 

"car battery

page 24 


9.2 Setting the number of cells and charge current for battery Output 2 

The Akku 2 (battery 2) output must be set to the type 

of cell, number of cells and charge current you wish 

to use. 

You can chose within 5 types of batteries and chose 

up to 4 (isl 6-330d 3) differnet charge currents. 

The values you select are stored permanently in the 


1. Hold the "+" button pressed in while you connect 

the charger to the car battery and wait until the selection 

menu appears (about 2-3 seconds). 

2. Release the button again. 

" ???? TypeSel B2" 

"4NiCd.3A- +next" (example) 

In the isl 6-330d both lines follow in succession. 

The value to select is marked by a question mark, in 

the isl 6-330d the cursor marks the position to select. 

You can chose following types of batteries: 

Nickel Cadmium (NiCd), 

Nickel Metallhydrid (NiMH), 

Lead/acid and Lead/gel (Lead), 

Lithium Manganoxid (LiMn), 

better known as Tadiran cell, 

Lithium Ionen (LiIo). 

3. Press the "+" button (+next) repeatedly to display 

the different battery types until the desired type appears. 

4. Select the shown type of cell by pressing the "-" 

button (e. g. .LiMn...-). 

5. After that, the cell count menu appears. 

"? CellCount A2" 

"1LiMn.3A- +next" (example) 

Depending of the selected type of battery you can 

chose following cell counts: 

NiCd: 1 - 6* cells = 1,2 ... 7,2 V 

NiMH: 1 - 6* cells = 1,2 ... 7,2 V 

Lead: 1 - 4* cells = 2, 4, 6, 8 V 

LiMn: 1 - 3* cells = 3,0 ... 9,0 V 

LiIo: 1 - 3* cells = 3,7 ... 11,1 V 

[*] maximum cell count with a supply voltage of 13,8 

V only, available on soft- & hardware from V 7.03 

6. Press the "+" button (+next) repeatedly until the 

desired cell count appears. 

7. Select the shown cell count by pressing the "-" button 

(e. g. 2LiMn...-). 

8. After that, the charge current menu appears: 

" cur-???-rent B2" 

"1LiMn.3A- +next" (example) 

You can chose between following currents 

(isl 6-330d in () ): 

100 mA = ".1A", (100 mA = ".1A") 

200 mA = ".2A", (200 mA = ".2A") 

332 mA = ".3A", (332 mA = ".3A") 

500 mA = ".5A", (332 mA = "



9.3 Program type after reset for A1 (9.3.1) 

Charge termination for A1 (9.3.2) 

Switch output (9.3.3) 

Melody select module (9.3.4) 

These 4 parameters can be adjusted in a single 

process. 

To do this hold the "+" and "-" buttons pressed 

in while you connect the isl 6 to the car battery, 

and wait until the menu 

"B1-cur.aft.reset" appears. 

9.3.1 Setting the program type after reset 

Here you select the program which is to appear 

as standard when you connect the isl 6 to the 

car battery. 

The program which appears after initial connection 

can be the: 

- last used program 

(more accurately: the program setting which 

applied when the battery was last connected; 

(Select "last" with the "-" button) 

or 

- the fully automatic charge program 

(Select "FAUTO" with the "+" Taste). 

When you have made your selection the menu 

"p1 cutoff mode" appears (description below). 

9.3.2 Setting charge termination sensitivity: 

Press the + button repeatedly to display the 

charge termination sensitivity. 

Press the - button to select the value on the 

screen. After you have made your selection 

your selected value is repeated again: 

"B1 cutoff mode" 

"--> xxxx " 

(xxxx = normal, sensitive [sensit.], sensitive + 

delay [sens+d]) 

After this selection the screen shows the menu for 

setting the light indicator at the switched output - 

even if the switched output is not installed (9.3.3). 

9.3.2.1 Possible selections 

Explanation: You can now adjust the method 

of working of the automatic Delta-Peak charge 

termination circuit. Three stages of sensitivity 

are available: 

schulze 

elektronik 

gmbh 

page 25 

1. normal 

Delta-peak termination using proven termination 

criteria. This setting is the most straightforward 

for most applications. 

2. sensitive (sensit.) 

3. sensitive with delay (sens+d) 

Re. 2.+3.: Delta-peak termination with sensitive 

trip characteristics. This setting switches off the 

charge voltage as soon as the voltage curve 

flattens out. This often applies to hybrid cells 

and similar, such as 1700SCE, RED AMP and 

many transmitter batteries. 

Note re. sens+d: 

With the sensitive settings you may find that 

deep-discharged cells are switched off right at 

the start of the charge process. The "sens+v" 

mode prevents this happening, because it incorporates 

a delay time after the pack is connected, 

and the automatic charge termination 

circuit is only activated after 8 minutes.I 

This means: the charge voltage is not 

monitored during the first 8 minutes, so 

the cells are charged for at least about 

10 minutes. 

Warning: for the same reason, if you connect a 

large number of cells for a final "top-up", they 

are likely to get very hot if the charge is set to 

"sens+d". 

9.3.2.2 Ni-MH batteries 

Tests with charging Ni-MH batteries have produced 

good results using the two "sensitive" 

termination settings, provided that manual 

charge current setting is used, and charge currents 

of no more than 1 C are set (i.e. 1000 mA 

charge rate for 1100 batteries). 

In our experience, batteries which fail 

to reach anything like their stated nominal 

capacity when charged also 

present the most problems in detecting 

the "battery full" state, i.e. the charger 

fails to switch off. 

Tests with modern high current Ni-MH batteries 

can be charged (depending on type) up to 1.6 C. 



page 26 

9.3.3 Switched output setting 

(not for isl 6-330d) 

" switch output " 

"12V perma- +next" re. a) 

You can chose among 3 different settings: 

a) 12V permanent 

The switched output provides 12 V continously, 

ideal to to drive a battery cooling fan or similar. 

b) FullBlinking 

The switched output provides 12 V on / off to 

drive a car flasher bulb when battery is fully 

charged or discharged. 

c) FullContinous 

The switched output provides 12 V continously 

to drive a car flasher bulb when battery is fully 

charged or discharged. 

Press the "+" button (+next) repeatedly to display 

the switch output features. 

Press the "-" button to select desired feature 

(e.g. FullBlink). 

The selected setting is repeated once more. 

Note re. switched output: 

The charger features a Cinch (phono) socket as 

widely used in audio equipment, and it is protected 

by an internal T 2.5 A fuse. It is designed 

for connection to a car flasher bulb (12V / 25W) 

so that you have a visual indicator of the "battery 

full" and "battery empty" states. 

As an alternative to the flashing light output the 

Cinch socket can be set up at the factory to 

provide a fixed 12 V to drive a battery cooling 

fan or similar. 

Note: the cables connected to this socket must 

be fitted with a ferrite core in order to keep within 

the CE limits for interference radiation. Use 

the "CE-Ring-i8" for this, and wind at least 9 

turns of the cable through it at a point no more 

than 5 cm from the Cinch plug. The cable must 

not be more than 2 m long. 


9.3.4 Melody selection setting 

Note: this option is only fitted to older chargers 

built before the end of 1995. 

If the module is present, you can press the "+" 

button to listen to all 12 melodies in turn. 

You select the melody you wish to hear when 

your batteries are "full" or "empty" by pressing 

the "-" button (melody 0 = buzzer). 

The selected melody (except melody 0) not only 

sounds when the program terminates, but also 

when you press the "+" and "-" buttons simultaneously 

to display the charged-in / discharged 

capacity of the active program. 

Note: you can cut short the melody or the buzzer 

at any time by pressing the "+" or "-" button. 

When you finish the setting-up procedure 

the screen will show the set charge termination 

sensitivity before the "ready" message 

appears, exactly as if you had just connected 

the charger to the car battery. 





10 Legal matters 

10.1 Warranty 

All isl 6 chargers are carefully checked and 

tested before dispatch. 

If you have a complaint, send the unit back to us 

with a clear description of the fault. 

A message such as "doesn't work properly" or 

"software error" doesn't help us much! 

Before you send your isl 6 back to us, please 

test the unit carefully, as it costs us money to 

test a charger, and if it turns out to be in working 

order we have to recover those costs from you. 

In this case it makes no difference whether the 

fully functional charger is returned within the 

warranty period or not. Approved warranty 

claims are processed in accordance with our 

currently valid General Conditions of Business, 

which are printed in our catalogue. 

One further note: if a problem arises with any 

schulze product, send it directly to us without interfering 

with it in any way. 

This ensures that we can repair the unit quickly, 

pick up warranty faults without any dispute, and 

keep costs to a minimum. 

You can also be sure that we will fit genuine replacement 

parts which will work properly in your 

unit. Unfortunately we have had bad experience 

with third-party Service Centres which claim 

technical competence. Note also that any outside 

interference with our products invalidates 

the warranty. Incompetent attempts at repair 

can cause further damage. We often find it impossible 

to estimate the repair cost of devices in 

such condition, and in certain circumstances we 

are then obliged to decline to repair it altogether. 

10.2 Limited liability / compensation 

We at Schulze Elektronik GmbH are unable to 

monitor the observance of our assembly and operation 

instructions, our prescribed conditions 

and methods for installation, connection, usage 

and maintenance of our battery chargers. For 

this reason we cannot accept liability for loss, 

damage or costs which arise through the inappropriate 

use of our products, or are connected 

in any way with such use. 

schulze 

elektronik 

gmbh 

page 27 

Within the normal legal limits, our obligation to 

provide compensation, for whatever legal reason, 

is limited to the invoice value of that quantity 

of product immediately involved in the event 

which caused the damage. This does not apply 

if we are obliged to accept unlimited liability in 

accordance with mandatory law due to our deliberate 

or serious negligence. 

10.3 CE approval 

All isl 6 units built after January 1996 satisfy all 

relevant and mandatory EC directives: these are 

the EMF directives 

- 89/336/EWG, 

- 91/263/EWG and 

- 92/31/EWG. 

The product has been tested to meet the following 

basic technical standards: 

Interference radiation: EN 50 081-1:1992, 

Interference susceptibility: EN 50 082-1:1992 

and/or EN 50 082-2:1995. 

You are the owner of a product whose design 

and construction fulfil the safety aims of the EC 

for the safe operation of devices. 

The approval procedure includes a test of interference 

radiation, i.e. of interference generated 

by the charger. This charger has been tested 

under practical conditions at maximum load current 

and with a large number of cells, and remains 

within the interference limits. A less stringent 

test would be, for example, to measure interference 

levels at a low charge current or with 

only 7 cells, in which mode the voltage converter 

would not be active. In such cases the charger 

would not produce its maximum interfer-ence 

level. 

The procedure also includes a test of interference 

susceptibility, i.e. the extent to which the 

charger is vulnerable to interference from other 

devices. The test involves subjecting the charger 

to RF signals similar to those produced by an 

RC transmitter or a radio telephone. 

Note: 

If you encounter problems in using this device, 

please carry out the measures described in Chapter 

13 and 14 before you decide that it is defective. 



page 28 

11 Specifications, technical features 


isl 6 Dims. Display Display No. of cells Capacity Charge currents Disch. currents 

approx. [kg][linexchar] [vis. area] [No. Ni-Cd] [Ah] [mA - A] [mA - A] 

-330d0,71 

-430d 1.1 

1 x 16 

2 x 16 

63x12mm 

61x15mm 

1 - 30 

1 - 30 

0.1 - 5 

0.1 - 4 

250 - 5,5 

250 - 5 

25 - 1 

25 - 2 

-530d 1.1 2 x 16 61x15mm 1 - 30 0.1 - 5 250 - 6 25 - 2 

-636+ 1.3 2 x 16 98x22mm 1 - 36 0.1 - 6 250 - 6.5 (8) 25 - 2 

-636e 1.3 2 x 16 61x15mm 1 - 36 0.1 - 6 250 - 6.5 (8) N.A. 

isl 6-... Lead-acid No. of cells Min. capacity Charge currents Disch. currents 

Model batteries [No. Pb] [Ah] [ca. A] [A] 

-330d 1, 3, 6, 12 1.0 0,25 - 4 0,1-1 

-430d 1, 3, 6, 12 1.0 0.25 - 4 0.1-2 

-530d 1, 3, 6, 12 1.0 0.25 - 4.5 0.1-2 

-636+ 1, 3, 6, 12 1.0 0.25 - 5 0.1-2 

-636e 1, 3, 6, 12 1.0 0.25 - 5 N.A. 

Summary of charge currents related to number of cells connected to Akku 1 output 

Voltage 6V 9V 11- 26V 34V 40V 45V 50V 

No. of cells ~4c ~6c ~8-16c ~20c ~24c ~27c ~30c 

-330d 2,1 A 4,0 A 5,5 A 3,7 A 2,9 A 2,4 A 2,0 A 

-430d 2.7 A 5.0 A 5.0 A 4.5 A 3.5 A 2.9 A 2.5 A 

-530d 2.7 A 5.3 A 6.0 A 6.0 A 4.8 A 4.0 A 3.5 A 

-636+,e 2.7 A 5.3 A 8.0 A 8.0 A 6.5 A 5.6 A 4.8 A 

Akku 2 output: 

Cell count: 1-6 Ni-Cd, 1-6 Ni-MH, 1-4 PB, 1-3 Li-Ion, 1-3 Li-MnO (Tadiran); 13,8V supply voltage... 

Charge current 100, 200, 330 mA or 500 mA (500 mA not for isl 6-330d), ...for max. cell count! 

Other features: 

- fully automatic charge current calculation for Akku 1 (patent application submitted) 

- Akku 1 und Akku 2 outputs can be used simultaneously 

- Akku 1 output suitable for use with Ni-Cd and Ni-MH batteries 

- Akku 1 output also suitable for lead-acid and lead-gel batteries (min. capacity 1Ah) 

- Safety charge termination after 3 hrs charge period at Akku 1 output 

(4h for 3dc program, 1st charge phase) 

- Tolerances at Akku 1, current: typically 5%; max. approx. 15% or 250 mA (higher value applies) 

- Tolerances at Akku 2, current: typically 5%; max. approx. 10% or 100 mA (higher value applies) 

- No-load current drain: approx. 200 mA 

- Continuous charge output at 100mA (mean value, pulsed 400mA supply) 

- Maximum discharge power dissipation 16 Watts (10 Watts isl 6-330d) 

- Power supply voltage: 11 - 15.2 V 

- Low voltage warning threshold: 11.25 V (10.5 V at reduced setting) 

- Low voltage power cut-off: 10.75 V (9.75V at reduced setting) 

- Cartridge fuse at Akku 1 output: 5 x 20 mm, rating M 16 A 

- All data refer to a car battery voltage of 12.5V DC 

- Recommended car battery: 12 V / greater than 63 Ah; minimum capacity: 12 V / 42 Ah 

Applicable to isl 6-636e only: 

- Small display; no discharge stage; melody module and switched output not available 





12 RS232 interface pinout and data convention 

12.1 Pinout of the jack connector of the the connecting cable 

schulze 

elektronik 

gmbh 

page 29 

RxD RS232 interface connector SUB D 9 pins (25 pins) 

TxD = transmiter of isl 6 connect with RXD Pin 2 (Pin 3) 

RxD = receiver of isl 6 connect with TXD Pin 3 (Pin 2) 

TxD Gnd Signal GND connect with GND Pin 5 (Pin 7) 

In the charger and in the sub d socket of our i6-RS-kab we mounted some resistors for safety reasons, 

which shall protect the interface against damage by short circuit during the connection of the 

plug into the socket. 

12.2 Data convention PC-connection 

Data transfer rate: 9600 Baud 

Datablock: A:sssss:uuuuu:iiiiiVSttt## (ASCII) 

Legend: A Output/Pack No. 

: Separation sign 

sssss time in seconds 


uuuuu Battery voltage in millivolts 


iiiii Current in milliamperes 

V[:,-] Charge/Discharge indicator 

S[l,L,E,P,v...] Charge-/Discharge-Status 

ttt[...] Battery temperature 

##[..] Device number 

Hint: Battery temperature and device number are transferred as "....." (points) 



page 30 

13 Error messages and their 

causes 

When certain limit values (car battery voltage, charger 

temperature, maximum charge power) are exceeded, 

the result may be to cut off the charge process 

(e.g. excess car battery voltage), or the screen 

may show an error message while the buzzer 

sounds; the buzzer is switched off automatically after 

a certain time. 

- If an error message appears, the screen only 

shows the charged quantity from then on; the charge 

period and charge voltage can no longer be read off. 

- At the Akku 2 output a battery voltage of less than 

about 0.5 V will cause the charger to assume incorrect 

polarity. 

- During charging at Akku 2 output with the maximum 

rated cell count (especially with 3 Li-Io cells) 

the warning/error "Vcar-Vbatt2



14 Trouble-shooting 

Dear customer, 

schulze 

elektronik 

gmbh 

page 31 

If your charger appears not to work as you expect it to, please run through the measures outlined 

below step by step before assuming that it is faulty. 

Only if you have completed all these checks, and the problem is still present, ring on our hotline 

for technical advice. Even better, fill in the service questionnaire (next page) and send or fax it to 

us. We will then ring you back with advice. 

From long years of experience with our battery chargers we know that most problems do 

not arise if the points listed below are followed to the letter. 

If we receive your charger but can find no fault with it ("no fault found") - which usually 

means that the measures described below have been ignored - please note once again that 

we incur costs in checking the unit, and that those costs are payable by you even if the 

charger is within the warranty period. 

1. Connect the charger to a fully charged car battery with a capacity of at least 60 Ah. Do not 

use a mains-powered Power Supply Unit! 

2. For the power supply to the charger use only the original cables and terminal clips. Connectors 

such as wander plugs, car cigar lighter plugs etc. are not suitable! If you have made changes, 

kindly restore the original cables and clips. Take care to produce sound soldered joints - no "solder 

blobs" or dry joints, please! 

3. Charge cables for all batteries should have a conductor cross-section of 2.5 sq mm. The 

charger's automatic current setting circuitry is only capable of setting a suitable (i.e. high) charge 

current for your battery if the cable is of this cross-section. Give the automatic circuit a fair chance! 

4. Just as important as the charge cables are the connectors attached to them. Use the proven 4 

mm gold-contact connectors at the charger end (don't use expensive wander plugs). Your flight 

packs should already be fitted with gold-contact connectors. Tin-plated connectors are completely 

unsuitable as their transfer resistance is high and they are prone to intermittent contact. Be sure that 

your cables are well soldered to the plugs and sockets. Do not fasten with screws. 

5. If you observe Points 3) and 4) and connect a discharged battery to the charger, the fully automatic 

charge mode should set a current of at least 1C, usually as much as 2C, after about 5 - 10 

min-utes. If this is not the case, then the internal resistance of the battery is probably excessive. In 

short, your battery has "had it", or is not suitable for rapid-charging. 

6. Ensure that there are no defective cells in the battery pack. Bad cells usually heat up early in 

the charge, and then cause the charger to switch off prematurely, and/or to set too low a charge 

current in automatic mode. 

7. If the 3-hour limit is exceeded when you are charging from the Akku 1 or Akku 2 output in automatic 

mode, then something is wrong with your charge cable, your connectors or your battery. 

Perhaps too small a cross-section in the charge cable? Connectors not good-quality gold-contact 

types? Dry solder joints? Battery ready for the bin, or not designed for rapid-charging? 

Establish the reason! Attempting to alter the 3-hour time limit is not the way forward, as in most cases 

a charge period of one hour already indicates that something is amiss. After 5 - 10 minutes the 

automatic circuitry should have set a charge current of at least 1C! 

8. Have you read the information in Chapter 1 (Warnings) and 2 (How to obtain reliable, troublefree 

operation) and observed the recommendations? 



page 32 

15 Service questionnaire Your address: 

To: schulze elektronik gmbh and 

Fax-No. +49 / 6150 / 1306-99 Telephone No.: 


Please complete every section. 

If a fault arises please return this form with the unit! 

Battery: Your information: Example: 

Purpose (Transmitter, receiver, flight pack) Transmitter 

Manufacturer Sanyo 

No. of cells / voltage 8-cell / 9,6 V 

Capacity 1700 mAh 

Type 1700SCE 

Cells soldered or clipped soldered 

Charge cable connector Barrel 

Charge cable: Original 

Length 1.5 m 

Cross-section 0.14 sq mm 

Charger connector 

Power supply: 

Wander plug 

Fault with mains PSU power: yes 

PSU type Power 150 

Output voltage 13 V 

Maximum output current 11 A 

Fault with car battery power: no 

Nominal capacity, car battery 

Charger: 

45 Ah 

Type isl 6-430d 

Charge output used Akku 1 

Charge program selected Auto C 

(Automatic mode:) max. charge current 0.83A 

(Automatic mode:) charge current at fault 0.25A 

Duration of charge 133 min 

Battery temperature at termination 30°C 

Error message 

Description of fault: 

# 52 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 

○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 





schulze 

elektronik 

gmbh 

page 33 



page 34

isl 6 chameleon: rapid charger series - Schulze Elektronik GmbH

Create successful ePaper yourself

Delete template?

Save as template?